DocID023274 Rev 4

15/28

TSX56x, TSX56xA

Application information

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4

Application information

4.1

Operating voltages

The amplifiers of the TSX56x and TSX56xA series can operate from 3 V to 16 V. Their

parameters are fully specified at 3.3 V, 5 V and 16 V power supplies. However, the

guaranteed in extended temperature ranges from -40 to +125 ° C.

4.2

Rail-to-rail input

The TSX56x and TSX56xA devices are built with two complementary PMOS and NMOS

input differential pairs. The devices have a rail-to-rail input, and the input common mode

However, the performance of these devices is clearly optimized for the PMOS differential

performance, as can be observed in the electrical characteristics section of this datasheet

needing to be rail-to-rail.

The devices are designed to prevent phase reversal.

4.3

Input offset voltage drift over temperature

The maximum input voltage drift over the temperature variation is defined as the offset

variation related to the offset value measured at 25 °C. The operational amplifier is one of

the main circuits of the signal conditioning chain, and the amplifier input offset is a major

contributor to the chain accuracy. The signal chain accuracy at 25 °C can be compensated

during production at application level. The maximum input voltage drift over temperature

enables the system designer to anticipate the effects of temperature variations.

The maximum input voltage drift over temperature is computed in Equation 1.

Equation 1

with T = -40 °C and 125 °C.

The datasheet maximum value is guaranteed by measurement on a representative sample

ΔT

------------

max

()

–

T25

° C

–

---------------------------------------------------

=